808
808

Oct 28, 2014
10/14

by
Perotti, Niccolò

texts

######
eye 808

######
favorite 0

######
comment 0

83
83

Sep 17, 2013
09/13

by
Alessandro Perotti

texts

######
eye 83

######
favorite 0

######
comment 0

Let H be the space of quaternions, with its standard hypercomplex structure. Let R(D) be the module of regular functions on D. For every unitary vector p in S^2, R(D) contains the space of holomorphic functions w.r.t. the complex structure J_p induced by p. We prove the existence, on any bounded domain D, of regular functions that are not J_p-holomorphic for any p. Our starting point is a result of Chen and Li concerning maps between hyperkaehler manifolds, where a similar result is obtained...

Source: http://arxiv.org/abs/0711.4440v1

291
291

May 31, 2011
05/11

by
Perotti, Jos

texts

######
eye 291

######
favorite 0

######
comment 0

This presentation provides an overview of the development of new hurricane wind sensor (Extreme Velocity Wind Sensor) for the Kennedy Space Center (KSC) which is designed to withstand winds of up to three hundred miles an hour. The proposed Extreme Velocity Wind Sensor contains no moveable components that would be exposed to extreme wind conditions. Topics covered include: need for new hurricane wind sensor, conceptual design, software applications, computational fluid dynamic simulations of...

Topics: COMBUSTION PHYSICS, EXPERIMENT DESIGN, FLUID JETS, JET MIXING FLOW, TURBULENCE MODELS, COMBUSTION...

34
34

Sep 22, 2013
09/13

by
Luca Perotti

texts

######
eye 34

######
favorite 0

######
comment 0

I show that the theory developed for quantum delocalization of an excited Hydrogen atom in a two-frequency linearly polarized microwave field can be used with a few adaptions to explain the quantum delocalization of Alkali atoms in a linearly polarized monochromatic field in the regime where it deviates from Hydrogenic behaviour. Comparison with numerical and laboratory experiments is satisfactory: apart from a constant factor, independent from the microwave frequency, the same dependence from...

Source: http://arxiv.org/abs/physics/0403051v1

497
497

Oct 30, 2014
10/14

by
Perotti, Niccolò

texts

######
eye 497

######
favorite 0

######
comment 0

2°. 81, [1] c., 1436 col, [15] c.

Topic: Linguae latinae commentarij.

23
23

Aug 25, 2016
08/16

by
Angelo Perotti

texts

######
eye 23

######
favorite 0

######
comment 0

Topic: bub_upload

Source: http://books.google.com/books?id=wPZIRXa9n1YC&hl=&source=gbs_api

307
307

Oct 25, 2014
10/14

by
Perotti, Niccolò

texts

######
eye 307

######
favorite 0

######
comment 0

583
583

Oct 27, 2014
10/14

by
Perotti, Niccolò

texts

######
eye 583

######
favorite 0

######
comment 0

273
273

Oct 27, 2014
10/14

by
Perotti, Niccolò

texts

######
eye 273

######
favorite 0

######
comment 0

147
147

Jul 20, 2013
07/13

by
Luca Perotti

texts

######
eye 147

######
favorite 0

######
comment 0

A numerical study of the quantum double pendulum is conducted. A suitable quantum scaling is found which allows to have as the only parameters the ratios of the lengths and masses of the two pendula and a (quantum) gravity parameter containing Planck's constant. Comparison with classical and semiclassical results is used to understand the behaviour of the energy curves of the levels, to define regimes in terms of the gravity parameter, and to classify the (resonant) interactions among levels by...

Source: http://arxiv.org/abs/nlin/0406018v1

29
29

Sep 23, 2013
09/13

by
Luca Perotti

texts

######
eye 29

######
favorite 0

######
comment 0

A fully classical explanation of the nonhydrogenic ionization threshold for low angular momentum Rydberg states of Alkali-metal atoms in a linearly polarized low frequency monochromatic microwave field is given: the classical equivalent to the quantum rate-limiting step, which is responsible for the n^(-5) scaling and which according to the literature initiates what then continues as essentially classical diffusion, is found.

Source: http://arxiv.org/abs/physics/0511046v1

330
330

Oct 27, 2014
10/14

by
Perotti, Niccolò

texts

######
eye 330

######
favorite 0

######
comment 0

Topic: bub_upload

Source: http://books.google.com/books?id=8kORn4_3kYAC&hl=&source=gbs_api

54
54

Aug 19, 2016
08/16

by
Pietro Perotti

texts

######
eye 54

######
favorite 0

######
comment 0

Topic: bub_upload

Source: http://books.google.com/books?id=uNBLhqgEDGsC&hl=&source=gbs_api

Topic: bub_upload

Source: http://books.google.com/books?id=Y9DsJgo9NoAC&hl=&source=gbs_api

287 pages ; 24mo

Topics: Library statistics, Libraries, Library statistics, Italy -- Libraries, Italy

31
31

Sep 20, 2013
09/13

by
Alessandro Perotti

texts

######
eye 31

######
favorite 0

######
comment 0

Let D be a domain in the quaternionic space H. We prove a differential criterion that characterizes Fueter-regular quaternionic functions f:bD -> H of class C^1. We find differential operators T and N, with complex coefficients, such that a function f is regular on D if and only if (N-jT)f=0 on the boundary of D (j a basic quaternion) and f is harmonic on D. As a consequence, by means of the identification of H with C^2, we obtain a non-tangential holomorphicity condition which generalizes a...

Source: http://arxiv.org/abs/math/0612092v2

74
74

May 16, 2011
05/11

by
Perotti, Simone

texts

######
eye 74

######
favorite 1

######
comment 0

Short stories and recipes

Topic: Cooking, Italian

740
740

Oct 25, 2014
10/14

by
Perotti, Niccolò

texts

######
eye 740

######
favorite 0

######
comment 0

112
112

Oct 26, 2014
10/14

by
Perotti, Niccolò

texts

######
eye 112

######
favorite 0

######
comment 0

23
23

Sep 20, 2013
09/13

by
Riccardo Ghiloni; Alessandro Perotti

texts

######
eye 23

######
favorite 0

######
comment 0

We introduce a family of Cauchy integral formulas for slice and slice regular functions on a real associative *-algebra. For each suitable choice of a real vector subspace of the algebra, a different formula is given, in which the domains of integration are subsets of the subspace. In particular, in the quaternionic case, we get a volume Cauchy formula. In the Clifford algebra case, the choice of the paravector subspace R^(n+1) gives a volume Cauchy formula for slice monogenic functions.

Source: http://arxiv.org/abs/1205.6290v1

26
26

Sep 22, 2013
09/13

by
Luca C. Perotti

texts

######
eye 26

######
favorite 0

######
comment 0

Experiments have shown that the microwave ionization probability of a highly excited almost monodimensional hydrogen atom subjected to a microwave pulse sometimes grows in steps when the peak electric field of the pulse is increased. Classical pulsed simulations display the same steps, which have been traced to phase-space metamorphoses. Quantum numerical calculations again exhibit the same ionization steps. I show that the time-sequence of two level interactions, responsible for the observed...

Source: http://arxiv.org/abs/0906.5180v1

30
30

Sep 23, 2013
09/13

by
Marco Giliberti; Luca Perotti

texts

######
eye 30

######
favorite 0

######
comment 0

The differential cross-section for the reflection of light beams off rigid bodies obtained by the rotation of a generic derivable convex function is calculated. The calculation is developed using elementary notions of calculus and is therefore suitable for calculus oriented introductory undergraduate university physics courses. Three particular cases are presented as examples of the general procedure and of the physical properties and considerations about cross-sections they allow to discuss in...

Source: http://arxiv.org/abs/1303.0408v1

18
18

Nov 12, 2012
11/12

by
Perotti, Jacques, 1929-

texts

######
eye 18

######
favorite 0

######
comment 0

Includes bibliographical references (pages 219-222)

Topics: Perotti, Jacques, 1929-, Homosexuality, Catholic gays, Gay clergy, Gay clergy, Catholic gays, Gay...

3
3.0

Jun 30, 2018
06/18

by
Riccardo Ghiloni; Alessandro Perotti

texts

######
eye 3

######
favorite 0

######
comment 0

We construct Lagrange interpolating polynomials for a set of points and values belonging to the algebra of real quaternions $H\simeq R_{0,2}$, or to the real Clifford algebra $R_{0,3}$. In the quaternionic case, the approach by means of Lagrange polynomials is new, and gives a complete solution of the interpolation problem. In the case of $R_{0,3}$, such a problem is dealt with here for the first time. Elements of the recent theory of slice regular functions are used. Leaving apart the...

Topics: Complex Variables, Mathematics, Rings and Algebras

Source: http://arxiv.org/abs/1404.7782

57
57

Apr 7, 2016
04/16

by
Giovanni Agostino Perotti

texts

######
eye 57

######
favorite 0

######
comment 0

Topic: bub_upload

Source: http://books.google.com/books?id=hVaXrVIrlagC&hl=&source=gbs_api

Pavia : Tacchinardi & Ferrari, <1912?> http://catalogo.unipd.it/F?func=find-c&ccl_term=IDN=PUV1039982&local_base=SBP01

Topic: LADAG LIBRI PUBBLICO DOMINIO GIURISPRUDENZA ENRICO LEVI CATELLANI

"Impariamo a programmare in TI BASIC", sulla programmazione dell'home computer Texas Instruments TI-99/4A. Con il patrocinio del Computer Club TI 99

Topics: libro, informatica, programmazione, BASIC, TI 99/4A, TI99/4A, TI-99/4A, book, computer, programming

21
21

Sep 22, 2013
09/13

by
Riccardo Ghiloni; Alessandro Perotti

texts

######
eye 21

######
favorite 0

######
comment 0

We study two types of series over a real alternative $^*$-algebra $A$. The first type are series of the form $\sum_{n} (x-y)^{\punto n}a_n$, where $a_n$ and $y$ belong to $A$ and $(x-y)^{\punto n}$ denotes the $n$--th power of $x-y$ w.r.t.\ the usual product obtained by requiring commutativity of the indeterminate $x$ with the elements of $A$. In the real and in the complex cases, the sums of power series define, respectively, the real analytic and the holomorphic functions. In the quaternionic...

Source: http://arxiv.org/abs/1302.5536v1

34
34

Sep 21, 2013
09/13

by
Riccardo Ghiloni; Alessandro Perotti

texts

######
eye 34

######
favorite 0

######
comment 0

In this paper we develop a theory of slice regular functions on a real alternative algebra $A$. Our approach is based on a well--known Fueter's construction. Two recent function theories can be included in our general theory: the one of slice regular functions of a quaternionic or octonionic variable and the theory of slice monogenic functions of a Clifford variable. Our approach permits to extend the range of these function theories and to obtain new results. In particular, we get a strong...

Source: http://arxiv.org/abs/1008.4318v1

137
137

Jul 24, 2013
07/13

by
Daniel Bessis; Luca Perotti

texts

######
eye 137

######
favorite 0

######
comment 0

We propose a new method in the spectral analysis of noisy time-series data for damped oscillators. From the Jacobi three terms recursive relation for the denominators of the Pad\'e Approximations built on the well-known Z-transform of an infinite time-series, we build an Hilbert space operator, a J-Operator, where each bound state (inside the unit circle in the complex plane) is simply associated to one damped oscillator while the continuous spectrum of the J-Operator, which lies on the unit...

Source: http://arxiv.org/abs/0807.3101v2

27
27

Sep 22, 2013
09/13

by
Luca C. Perotti

texts

######
eye 27

######
favorite 0

######
comment 0

Comparisons of experimental data with numerical predictions of a classical model indicate that an excited hydrogen atom in a pulsed microwave electric field exhibits a nonclassical increase of stability over a relatively wide range of frequencies. I show here that this is due to selective population of long-lived "scarred" states that are associated with the chaotic separatrix band surrounding the principal classical resonance zone in phase space. A quantum explanation is given in...

Source: http://arxiv.org/abs/0906.5186v1

41
41

Sep 19, 2013
09/13

by
Luca Perotti; Daniel Bessis

texts

######
eye 41

######
favorite 0

######
comment 0

We discuss the construction of optimized electronic filters using inverse scattering methods. We study a wide range of densities and temperatures, room temperature included. Discretization methods of the potential (including the self-consistent potential of the conduction electrons) are worked out that retain all its properties.

Source: http://arxiv.org/abs/cond-mat/0304340v1

0
0.0

Jun 28, 2018
06/18

by
Giorgio Mantica; Luca Perotti

texts

######
eye 0

######
favorite 0

######
comment 0

Typically, in the dynamical theory of extremal events, the function that gauges the intensity of a phenomenon is assumed to be convex and maximal, or singular, at a single, or at most a finite collection of points in phase--space. In this paper we generalize this situation to fractal landscapes, i.e. intensity functions characterized by an uncountable set of singularities, located on a Cantor set. This reveals the dynamical r\^ole of classical quantities like the Minkowski dimension and...

Topics: Statistics Theory, Statistics, Mathematics, Geophysics, Mathematical Physics, Nonlinear Sciences,...

Source: http://arxiv.org/abs/1512.07383

53
53

Jul 23, 2010
07/10

by
Alejandro D. Perotti, web.austral.edu.ar,

texts

######
eye 53

######
favorite 0

######
comment 0

http://notisan.blogspot.com/2010/07/realizan-analisis-del-proyecto-codigo.html

Topics: mercosur, congreso, notisan, felixcontreras, ciudadanointeligente

32
32

Sep 21, 2013
09/13

by
Daniel Bessis; Luca Perotti

texts

######
eye 32

######
favorite 0

######
comment 0

We propose to apply to the detection of Gravitational Waves a new method developed for the spectral analysis of noisy time-series of damped oscillators. From the Pad\'e Approximations of the time-series Z-transform, a Jacobi Matrix (J-Matrix) is constructed. We show that the J-Matrix has bound states with eigenvalues strictly inside the unit circle. Each bound state can be identified with one precise damped oscillator. Beside these bound states, there is an essential spectrum sitting on the...

Source: http://arxiv.org/abs/0905.2000v1

55
55

Sep 23, 2013
09/13

by
Riccardo Ghiloni; Alessandro Perotti

texts

######
eye 55

######
favorite 0

######
comment 0

We study in detail the zero set of a regular function of a quaternionic or octonionic variable. By means of a division lemma for convergent power series, we find the exact relation existing between the zeros of two octonionic regular functions and those of their product. In the case of octonionic polynomials, we get a strong form of the fundamental theorem of algebra. We prove that the sum of the multiplicities of zeros equals the degree of the polynomial and obtain a factorization in linear...

Source: http://arxiv.org/abs/0904.2667v2

476
476

May 31, 2011
05/11

by
Perotti, Jose M

texts

######
eye 476

######
favorite 0

######
comment 0

This viewgraph presentation summarizes the characteristics required on sensors by consumers desiring access to space, a long term plan developed at KSC (Kennedy Space Center) to identify promising technologies for NASA's own future sensor needs, and the characteristics of several smart sensors already developed. Also addressed are the computer hardware and architecture used to operate sensors, and generic testing capabilities. Consumers desire sensors which are lightweight, inexpensive,...

Topics: MICROGRAVITY, RIBONUCLEIC ACIDS, GLUCOCORTICOIDS, NEURONS, RATS, GENES, ASSAYING, NERVOUS SYSTEM

121
121

Jun 8, 2016
06/16

by
Phaedrus; Perotti, Niccolò, 1430-1480

texts

######
eye 121

######
favorite 0

######
comment 0

Printed on yellow paper

Topic: bub_upload

Source: http://books.google.com/books?id=9r9JAQAAMAAJ&hl=&source=gbs_api

197
197

Jan 3, 2017
01/17

by
Bardetti, Stanislao, 1688-1767; Perotti

texts

######
eye 197

######
favorite 0

######
comment 0

Binding: marbled paper, half vellum. Spine gilt tooled, author & title on label. Edges roughly trimmed

Topics: Bardetti, Stanislao, 1688-1767, Celtic languages, Germanic languages

2
2.0

Jun 30, 2018
06/18

by
Alberto G. Perotti; Branislav M. Popovic

texts

######
eye 2

######
favorite 0

######
comment 0

A new non-orthogonal multiple access scheme performing simultaneous transmission to multiple users characterized by different signal-to-noise ratios is proposed. Different users are multiplexed by storing their codewords into a multiplexing matrix according to properly designed patterns and then mapping the columns of the matrix onto the symbols of a higher-order constellation. At the receiver, an interference cancellation algorithm is employed in order to achieve a higher spectral efficiency...

Topics: Mathematics, Computing Research Repository, Information Theory

Source: http://arxiv.org/abs/1410.5579

2
2.0

Jun 27, 2018
06/18

by
Maxim Derevyagin; Luca Perotti; Michal Wojtylak

texts

######
eye 2

######
favorite 0

######
comment 0

We consider the class of non-Hermitian operators represented by infinite tridiagonal matrices, selfadjoint in an indefinite inner product space with one negative square. We approximate them with their finite truncations. Both infinite and truncated matrices have eigenvalues of nonpositive type: either a single one on the real axis or a couple of complex conjugate ones. As a tool to evaluate the reliability of the use of truncations in numerical simulations, we give bounds for the rate of...

Topics: Mathematics, Mathematical Physics

Source: http://arxiv.org/abs/1503.04314

44
44

Aug 14, 2014
08/14

by
Epictetus; Perotti, Niccolò, 1430-1480, tr

texts

######
eye 44

######
favorite 0

######
comment 0

Bibliographical footnotes. "Elenchvs Nicolai Perotti Opervm" : p. 137-166

22
22

Sep 19, 2013
09/13

by
Luca Perotti; Daniel Vrinceanu; Daniel Bessis

texts

######
eye 22

######
favorite 0

######
comment 0

From a time series whose data are embedded in heavy noise, we construct an Hilbert space operator (J-operator) whose discrete spectrum represents the signal while the essential spectrum located on the unit circle, is associated with the noise. Furthermore the essential spectrum, in the absence of signal, is built from roots of unity ("clock" distribution). These results are independent of the statistical properties of the noise that can be Gaussian, non-Gaussian, pink or even without...

Source: http://arxiv.org/abs/1009.6021v1

0
0.0

Jun 30, 2018
06/18

by
Luca Perotti; Daniel Vrinceanu; Daniel Bessis

texts

######
eye 0

######
favorite 0

######
comment 0

We present a new method to locate the starting points in time of an arbitrary number of (damped) delayed signals. For a finite data sequence, the method permits to first locate the starting point of the component with the longest delay, and then --by iteration-- all the preceding ones. Numerical examples are given and noise sensitivity is tested for weak noise.

Topics: Physics, Data Analysis, Statistics and Probability

Source: http://arxiv.org/abs/1703.07001

0
0.0

Jun 30, 2018
06/18

by
Riccardo Ghiloni; Valter Moretti; Alessandro Perotti

texts

######
eye 0

######
favorite 0

######
comment 0

General, especially spectral, features of compact normal operators in quaternionic Hilbert spaces are studied and some results are established which generalize well-known properties of compact normal operators in complex Hilbert spaces. More precisely, it is proved that the norm of such an operator always coincides with the maximum of the set of absolute values of the eigenvalues (exploiting the notion of spherical eigenvalue). Moreover the structure of the spectral decomposition of a generic...

Topics: Complex Variables, Functional Analysis, Mathematics, Mathematical Physics

Source: http://arxiv.org/abs/1402.2935

37
37

Apr 9, 2009
04/09

by
philippe perotti AKA FIRSTTAKE_steam_prod

audio

######
eye 37

######
favorite 0

######
comment 0

The sound was contributed for TheROOM installation by o.blaat at Medien Kultur Haus, Wels, Austria, 2009.

Topics: philippe perotti AKA FIRSTTAKE_steam_prod, night railwork, back garden, TheROOM, o.blaat, Medien...

1
1.0

Jun 30, 2018
06/18

by
Alberto G. Perotti; Branislav M. Popovic

texts

######
eye 1

######
favorite 0

######
comment 0

We propose an enhanced version of trellis coded multiple access (TCMA), an overloaded multiple access scheme that outperforms the original TCMA in terms of achieved spectral efficiency. Enhanced TCMA (ETCMA) performs simultaneous transmission of multiple data streams intended for users experiencing similar signal-to-noise ratios and can be employed both in the uplink and in the downlink of wireless systems, thus overcoming one of the main limitations of TCMA. Thanks to a new receiver algorithm,...

Topics: Mathematics, Computing Research Repository, Information Theory

Source: http://arxiv.org/abs/1407.0901